An off-by-one error in Compress::Raw::Zlib and Compress::Raw::Bzip2 might lead to a Denial of Service.

Announced

2009-08-18

Revised

2009-08-18

Access

remote

Bugs

#273141 #281955

Advisory

https://security.gentoo.org/glsa/200908-07

Affected packages

Package	Arch	Vulnerable	Unaffected
perl-core/Compress-Raw-Bzip2	*	< 2.020	>= 2.020
perl-core/Compress-Raw-Zlib	*	< 2.020	>= 2.020

Background

Compress::Raw::Zlib and Compress::Raw::Bzip2 are Perl low-level interfaces to the zlib and bzip2 compression libraries.

Description

Leo Bergolth reported an off-by-one error in the inflate() function in Zlib.xs of Compress::Raw::Zlib, possibly leading to a heap-based buffer overflow (CVE-2009-1391).

Paul Marquess discovered a similar vulnerability in the bzinflate() function in Bzip2.xs of Compress::Raw::Bzip2 (CVE-2009-1884).

Impact

A remote attacker might entice a user or automated system (for instance running SpamAssassin or AMaViS) to process specially crafted files, possibly resulting in a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All Compress::Raw::Zlib users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=perl-core/Compress-Raw-Zlib-2.020"

All Compress::Raw::Bzip2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=perl-core/Compress-Raw-Bzip2-2.020"

References

• CVE-2009-1391
• CVE-2009-1884